With the introduction of its CoolGaN 600 V enhancement mode (e-mode) HEMTs and GaN EiceDRIVER gate driver ICs, Infineon Technologies is said to be the only company in the market currently offering a full-spectrum portfolio of all power technologies – silicon (Si), silicon carbide (SiC) and GaN.
The newly launched CoolGaN 600 V e-mode HEMTs are built with a reliable normally-off concept, optimized for fast turn-on and turn-off. They enable high efficiency and density levels in switched mode power supplies (SMPS) showing the best figures of merit (FOMs) of all currently available 600 V devices. CoolGaN switches come with lowest gate charge and excellent dynamic performance in reverse conduction. This allows much higher frequency operations, thus improving power density by reducing the overall size of passive components. Infineon’s CoolGaN 600 V e-mode HEMTs enable highest power factor correction (PFC) efficiency (>99.3 percent for 2.5 kW PFC) and significantly higher density for the same efficiency (>160 W/in 3 for 3.6 kW LLC with >98 percent efficiency). The linear output capacitance leads to 8-10 times lower dead time in resonant topologies.
The CoolGaN 600 V switches are available with 70 mΩ and 190 mΩ in SMD packages, guaranteeing excellent thermal performance and low parasitics.
Infineon’s new EiceDRIVERICs – the 1EDF5673K, 1EDF5673F and 1EDS5663H are a perfect fit for the CoolGaN e-mode HEMTs. They are developed to ensure robust and highly efficient CoolGaN switch operation while minimizing R&D efforts and shortening time-to-market.
Unlike gate driver ICs for power MOSFETs, the Infineon CoolGaN tailor-made gate driver ICs provide a negative output voltage to rapidly turn off GaN switches. For the entire duration the switch is intended to be off, the GaN EiceDRIVER ICs can firmly hold the gate voltage at zero. This protects the GaN switch against spurious turn-on, even for the first pulse, which is essential for robust SMPS operations.
The GaN gate driver ICs allow constant GaN HEMT switching slew rates, virtually independent from duty cycle or switching frequency. This ensures operational robustness and high power efficiency, and greatly reduces R&D time. Galvanic isolation is integrated for operational robustness in hard switching applications. It also provides protection between the primary and secondary side of an SMPS and between power and logic stages where needed.
The GaN EiceDRIVER 1EDF5673K comes in a 13-pin LGA 5×5 mm, the 1EDF5673F in a 16-pin DSO 150 mil, and the 1EDS5663H in a 16-pin DSO 300 mil package.